*{
    margin: 0;
    padding: 0;
    list-style: none;  
}

.wrapper{
    width: 512px;
    height: 600px;
    border: 1px solid #ccc;
    margin: 100px auto;
}
.main {
    width: 100%;
    margin: 10px auto;
    border: 1px solid red;

}
.main ul {
    overflow: hidden;
    width: 100%;
    border: 1px solid black;
    margin: 0 auto;
}
.initLi{
    float: left;
    width: 10px;
    height: 10px;
    padding: 10px;
    background-color: orange;
    border: 1px solid black;
    line-height: 10px;
    text-align: center;
}
.init::after{
    content: "";
    display: block;
    clear: both;

}
.leiShow {
    background-image: url("./img/lei.jpg");
    background-size: 100% 100%;
}
.numShow{
    background: #fff;
}

.flag{
    background-image: url("./img/qi.jpg");
    background-size: 100% 100%;
}